Brush-holder retainer



L y INVENTOR- Q BYE /ATTORNE R N BAYLIS BRUSH HOLDER RETAINER F I E JUN 7 1922 Feb 6.. 1923.

Patented Feb. 6, 1923.

UNITED STATES ROBERT N. BAYLIS, OF BLOOMFIELD, NEW JERSEY, SSIGNOR COMPANY, OF BLOOMFIELD, NEVI JERSEY, A. CORP PATENT OFFICE.

BRUSH-HOLDER RETAINER.

Application tiled Tune 7,

f 7mm 12mg/ come/,w it known that l. Reif i o t tee United States oi ini-er cation.

Bly invention relates to brush holders and proveifl inprox'eii tf arti;a.l sly an brush retainer there onf.

accon'ipanyingr drawingss a nerspect've vien' i appears in use.

is a perspective vier; :at L 'titty modi tied.

Fig". 3 is :1 similar Yiew of' sah further nioditieil.

In the drawingfs.y 1 nts th.. body ot' brush holder which cani being' mounted on a snitahe support Qy adjacent a coinniutator 21; represents a carbon brush which is and guided on the surface 5 of the brush holder l, which is arran d at an angle to the of eoinvnntator. a spring' er., the end eff Wl ich hears 4- so as to feed it Lowa vl and cans it to bear on desired degree oli' pressure. is particularly nf nl on that t er in which the Alash gnid ranged at an acute anglo to the face o? the mnmtaioi* is trom Ybei '-1 hal. there/:1o. noveljf is mule herein 'For the b alone. ln 1'; c t type oi' brush hohe shwrn hereinn in which the brush ir; supported at its rear side only on a surface such as 5, it is desirable to .have a retainer which einhraees the brush and through which the lnfnsh magi move. It is also preterable that this retainer shall be made trein a strip ot metal` ot Auniform Width and shall be pro vided With sach tasteni means that all oit said retainers.y irrespectife o?? sise`r may be interchangeable and secured to the brush holder body Without modification of said securingr means or its position or angle of attachment, that is to say, the securing or fastening means should be universal and standard to simplify manufacture and assembly. In the drawings I have shown three modifications ot the same retainer. As shown, the same is formed of a strip of 1922. Serial 566,612.

nic'a; prt/vide a troni; side "5" l t' ano )t or er; 'fa A t .eig ni aired to body holder. Ythe hoh ffieicd e side it will be tlist the retain-er is fixed at an anvarv ina' incline with mntator so of the retainer relai It infill also lower l e et' 'oartmll across 7 iront re have te be t wherein Thus. as

the

sorti" i negre/e oi' offs et the retainer increases. the lewe cnt back still more clearance Three For 3X2 meer edge is l more, the 'trent gnard hein@ ineicated at 7",

.J`\.'ttention is also directed to the notched npoer part et the 'front guard shown. in s. .l and 2. rThis notch in is inl ted at 11, and in Fig. 2 lla. By providing this notch7 clearance is afforded for the end ot the follower 6 when the brush has been Worn down to a point Where the follower end passes the upper edge ot the retainer. Again, this notch renders somewhat more accessible for removal anyv remaining short portion of the brush that may stand in the retainer after the said brush has been Worn down to the limit ot its will he soon 1,'

usefulness. liihile it is desirable to have the notches ll. present in retainers adapted to the thinner brushes, it need not be present in all cases and need never be present in retainers adapted to take the thickest brushes, as shown in 'll/'hile l have shown only three sizes here in, it will be understood that as many sizes may be made as required for the various sizes of brushes. ln all instances it will be observed the retainers are secured 'to the body of the brush holder in a predetermined position. Therefore, it requires no modification of the brush holder itself to apply thereto retainers of any size. lt will be understood that the width of the retainers may be varied at will in accordance with brushes of different widths, but this will not affect either the positioning of the retainer on the holder nor the other features hereinbefore described. lt will be observed that the degree to which the lower edge of the strip is out away increases with the degree of odset of the front guard from the brush supporting face of the holder itself, and it will also be observed that whenever 'the lower edge of the front guard is out away to provide clearance, the adjacent portions of the side guards 8-8 should also be correspondingly cut away for the same purpose.

ln some instances the front guard bar could be entirely cut away at the middle, as indicated between the dotted lines shown in Fig. 2, without departure from the spirit or scope of my invention.

W hat l claim is:

l. A brush retainer for brush holders comprising a front guard, two side guards, the latter being extended to form ears for predetermined fined engagement with the body of the brush holder, the lower edge of said retainer adjacent the front guard and the adjacent edges of the side guards being partially cut away to adord clearance for a commutator, the extent to which said parts are cut away being in proportion to the de` grec of-oifset of the front guard from the brush supporting face of the holder.

italianas 2. A brush retainer for brush holders comprising a front guard, two side guards, the latter being extended to form ears for predetermined fixed engagement with the body of the brush holder, the lower edge of said retainer adjacent the front guard and the adjacent edges of the side guards being partially cut away to afford clearance for a commutator, the extent to which said parts are cut away being in proportion to the degree of offset of the front guard from the brush supporting face of the holder, the upper ed'e of said strip adjacent the front guard being also cut away to afford clearance.

3. The combination of a brush holder comprising a body having a brush supporting face, a sheet metal brush retainer bent to form a front guard and two side guards, the latter being extended toform fastening ears, with means for securing ysaid ears in a predetermined fixed position on the body of the holder, said front guard being ar ranged in front of, and spaced away from,

,said brush supporting face, the middle portion of said strip being cut back at the lower edge to provide clearance for a commutator under the outer endof said retainer, the amount t-o which said strip is cut back being in substantial proportion to the degree to phich the front guard is offset from Said ace.

et. In a brush holder having a brush` supporting face arranged at an angle relatively to the comniutating surface of a comniutator, a sheet metal brush retainer car ried by said holder and shaped to form a front guard spaced away from said supporting surface, and side guards connecting the saine to said holder at opposite sides thereof, the lower edge of the front guard being cut back to provide clearance for the commutator, the degree to which said bar is cut back being in substantial proportion to the degree of offset of the front guard from the vbrush supporting face of the holder.

ROBERT N. BAYLIS. 

